US Sources

India from Crown Rule to Republic, 1945-1949: Records of the U.S. State Department includes material on political parties and elections, unrest and revolution, human rights, government, administration, fiscal and monetary issues, labor, housing, police and crime, public health, national defense, foreign policymaking, wars and alliances, education, religion, culture, trade, industry, foreign relations, and natural resources.

Afghanistan and the US, 1945-1963: Records of US State Department Classified Files

India-Pakistan Conflict: Records of the U.S. State Department, February 1963-1966

Indo-U.S. relations, 1947-1989 : a guide to information sources, by Santosh C. Saha. New York : P. Lang, 1990. xii, 213 p.
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The United States and India : a history through archives : the formative years, ed. by Praveen K. Chaudhry, Marta Vanduzer-Snow. Thousand Oaks, Calif. : Sage Publications, 2008. 683 p.
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General sources on US foreign relations.